chore: initialize qiming workspace repository

qimingcode/packages/opencode/test/lsp/client.test.ts

@@ -0,0 +1,482 @@
+import { beforeEach, describe, expect, test } from "bun:test"
+import path from "path"
+import { pathToFileURL } from "url"
+import { tmpdir } from "../fixture/fixture"
+import { LSPClient } from "../../src/lsp"
+import { LSPServer } from "../../src/lsp"
+import { Instance } from "../../src/project/instance"
+import { Log } from "../../src/util"
+
+function spawnFakeServer() {
+  const { spawn } = require("child_process")
+  const serverPath = path.join(__dirname, "../fixture/lsp/fake-lsp-server.js")
+  return {
+    process: spawn(process.execPath, [serverPath], {
+      stdio: "pipe",
+    }),
+  }
+}
+
+describe("LSPClient interop", () => {
+  beforeEach(async () => {
+    await Log.init({ print: true })
+  })
+
+  test("handles workspace/workspaceFolders request", async () => {
+    const handle = spawnFakeServer() as any
+
+    const client = await Instance.provide({
+      directory: process.cwd(),
+      fn: () =>
+        LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: process.cwd(),
+          directory: process.cwd(),
+        }),
+    })
+
+    await client.connection.sendNotification("test/trigger", {
+      method: "workspace/workspaceFolders",
+    })
+
+    await new Promise((resolve) => setTimeout(resolve, 100))
+    expect(client.connection).toBeDefined()
+    await client.shutdown()
+  })
+
+  test("handles client/registerCapability request", async () => {
+    const handle = spawnFakeServer() as any
+
+    const client = await Instance.provide({
+      directory: process.cwd(),
+      fn: () =>
+        LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: process.cwd(),
+          directory: process.cwd(),
+        }),
+    })
+
+    await client.connection.sendNotification("test/trigger", {
+      method: "client/registerCapability",
+    })
+
+    await new Promise((resolve) => setTimeout(resolve, 100))
+    expect(client.connection).toBeDefined()
+    await client.shutdown()
+  })
+
+  test("handles client/unregisterCapability request", async () => {
+    const handle = spawnFakeServer() as any
+
+    const client = await Instance.provide({
+      directory: process.cwd(),
+      fn: () =>
+        LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: process.cwd(),
+          directory: process.cwd(),
+        }),
+    })
+
+    await client.connection.sendNotification("test/trigger", {
+      method: "client/unregisterCapability",
+    })
+
+    await new Promise((resolve) => setTimeout(resolve, 100))
+    expect(client.connection).toBeDefined()
+    await client.shutdown()
+  })
+
+  test("initialize does not overclaim unsupported diagnostics capabilities", async () => {
+    const handle = spawnFakeServer() as any
+
+    const client = await Instance.provide({
+      directory: process.cwd(),
+      fn: () =>
+        LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: process.cwd(),
+          directory: process.cwd(),
+        }),
+    })
+
+    const params = await client.connection.sendRequest<any>("test/get-initialize-params", {})
+    expect(params.capabilities.workspace.diagnostics.refreshSupport).toBe(false)
+    expect(params.capabilities.textDocument.publishDiagnostics.versionSupport).toBe(false)
+
+    await client.shutdown()
+  })
+
+  test("workspace/configuration returns one result per requested item", async () => {
+    const handle = spawnFakeServer() as any
+    const initialization = {
+      alpha: {
+        beta: 1,
+      },
+      gamma: true,
+    }
+
+    const client = await Instance.provide({
+      directory: process.cwd(),
+      fn: () =>
+        LSPClient.create({
+          serverID: "fake",
+          server: {
+            ...(handle as unknown as LSPServer.Handle),
+            initialization,
+          },
+          root: process.cwd(),
+          directory: process.cwd(),
+        }),
+    })
+
+    const response = await client.connection.sendRequest<any[]>("test/request-configuration", {
+      items: [{ section: "alpha" }, { section: "alpha.beta" }, { section: "missing" }, {}],
+    })
+
+    expect(response).toEqual([{ beta: 1 }, 1, null, initialization])
+
+    await client.shutdown()
+  })
+
+  test("sends ranged didChange for incremental sync servers", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.ts")
+    await Bun.write(file, "first\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        await client.notify.open({ path: file })
+        await Bun.write(file, "second\nthird\n")
+        await client.notify.open({ path: file })
+
+        const change = await client.connection.sendRequest<{
+          textDocument: { version: number }
+          contentChanges: {
+            range?: { start: { line: number; character: number }; end: { line: number; character: number } }
+            text: string
+          }[]
+        }>("test/get-last-change", {})
+        expect(change.textDocument.version).toBe(1)
+        expect(change.contentChanges).toEqual([
+          {
+            range: {
+              start: { line: 0, character: 0 },
+              end: { line: 1, character: 0 },
+            },
+            text: "second\nthird\n",
+          },
+        ])
+
+        await client.shutdown()
+      },
+    })
+  })
+
+  test("document mode falls back to push diagnostics", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.ts")
+    await Bun.write(file, "const x = 1\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        const version = await client.notify.open({ path: file })
+        const wait = client.waitForDiagnostics({ path: file, version, mode: "document" })
+        await client.connection.sendNotification("test/publish-diagnostics", {
+          uri: pathToFileURL(file).href,
+          version,
+          diagnostics: [
+            {
+              range: {
+                start: { line: 0, character: 0 },
+                end: { line: 0, character: 5 },
+              },
+              message: "push diagnostic",
+              severity: 1,
+            },
+          ],
+        })
+        await wait
+
+        const diagnostics = client.diagnostics.get(file) ?? []
+        expect(diagnostics).toHaveLength(1)
+        expect(diagnostics[0]?.message).toBe("push diagnostic")
+
+        const count = await client.connection.sendRequest("test/get-diagnostic-request-count", {})
+        expect(count).toBe(0)
+
+        await client.shutdown()
+      },
+    })
+  })
+
+  test("document mode accepts matching push diagnostics published before waiting", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.ts")
+    await Bun.write(file, "const x = 1\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        const version = await client.notify.open({ path: file })
+        await client.connection.sendNotification("test/publish-diagnostics", {
+          uri: pathToFileURL(file).href,
+          version,
+          diagnostics: [
+            {
+              range: {
+                start: { line: 0, character: 0 },
+                end: { line: 0, character: 5 },
+              },
+              message: "push diagnostic",
+              severity: 1,
+            },
+          ],
+        })
+
+        for (let i = 0; i < 20 && (client.diagnostics.get(file)?.length ?? 0) === 0; i++) {
+          await new Promise((resolve) => setTimeout(resolve, 25))
+        }
+
+        expect(client.diagnostics.get(file)?.[0]?.message).toBe("push diagnostic")
+
+        const started = Date.now()
+        await client.waitForDiagnostics({ path: file, version, mode: "document" })
+        expect(Date.now() - started).toBeLessThan(1_000)
+
+        await client.shutdown()
+      },
+    })
+  })
+
+  test("document mode waits for pull diagnostics", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.cs")
+    await Bun.write(file, "class C {}\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        await client.connection.sendRequest("test/configure-pull-diagnostics", {
+          registerOn: "didOpen",
+          registrations: [{ identifier: "DocumentCompilerSemantic" }],
+          documentDiagnosticsByIdentifier: {
+            DocumentCompilerSemantic: [
+              {
+                range: {
+                  start: { line: 0, character: 0 },
+                  end: { line: 0, character: 5 },
+                },
+                message: "pull diagnostic",
+                severity: 1,
+              },
+            ],
+          },
+        })
+
+        const version = await client.notify.open({ path: file })
+        await client.waitForDiagnostics({ path: file, version, mode: "document" })
+
+        const diagnostics = client.diagnostics.get(file) ?? []
+        expect(diagnostics).toHaveLength(1)
+        expect(diagnostics[0]?.message).toBe("pull diagnostic")
+
+        const count = await client.connection.sendRequest("test/get-diagnostic-request-count", {})
+        expect(count).toBeGreaterThan(0)
+
+        await client.shutdown()
+      },
+    })
+  })
+
+  test("document mode does not wait for the slowest pull identifier after current-file diagnostics arrive", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.cs")
+    await Bun.write(file, "class C {}\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        await client.connection.sendRequest("test/configure-pull-diagnostics", {
+          registrations: [{ identifier: "fast" }, { identifier: "slow" }],
+          documentDiagnosticsByIdentifier: {
+            fast: [
+              {
+                range: {
+                  start: { line: 0, character: 0 },
+                  end: { line: 0, character: 5 },
+                },
+                message: "fast diagnostic",
+                severity: 1,
+              },
+            ],
+            slow: [],
+          },
+          documentDelayMsByIdentifier: {
+            slow: 2_500,
+          },
+        })
+
+        const version = await client.notify.open({ path: file })
+        await client.connection.sendRequest("test/register-configured-pull-diagnostics", {})
+        await new Promise((resolve) => setTimeout(resolve, 100))
+        const started = Date.now()
+        await client.waitForDiagnostics({ path: file, version, mode: "document" })
+
+        expect(Date.now() - started).toBeLessThan(1_000)
+        expect(client.diagnostics.get(file)?.[0]?.message).toBe("fast diagnostic")
+        expect(await client.connection.sendRequest("test/get-diagnostic-request-count", {})).toBeGreaterThan(1)
+
+        await client.shutdown()
+      },
+    })
+  })
+
+  test("full mode includes workspace pull diagnostics", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.cs")
+    const related = path.join(tmp.path, "other.cs")
+    await Bun.write(file, "class C {}\n")
+    await Bun.write(related, "class D {}\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        await client.connection.sendRequest("test/configure-pull-diagnostics", {
+          registerOn: "didOpen",
+          registrations: [
+            { identifier: "DocumentCompilerSemantic" },
+            { identifier: "WorkspaceDocumentsAndProject", workspaceDiagnostics: true },
+          ],
+          documentDiagnosticsByIdentifier: {
+            DocumentCompilerSemantic: [
+              {
+                range: {
+                  start: { line: 0, character: 0 },
+                  end: { line: 0, character: 5 },
+                },
+                message: "current file",
+                severity: 1,
+              },
+            ],
+          },
+          workspaceDiagnosticsByIdentifier: {
+            WorkspaceDocumentsAndProject: [
+              {
+                uri: pathToFileURL(related).href,
+                items: [
+                  {
+                    range: {
+                      start: { line: 0, character: 0 },
+                      end: { line: 0, character: 5 },
+                    },
+                    message: "workspace file",
+                    severity: 1,
+                  },
+                ],
+              },
+            ],
+          },
+        })
+
+        const version = await client.notify.open({ path: file })
+        await client.waitForDiagnostics({ path: file, version, mode: "full" })
+
+        expect(client.diagnostics.get(file)?.[0]?.message).toBe("current file")
+        expect(client.diagnostics.get(related)?.[0]?.message).toBe("workspace file")
+
+        await client.shutdown()
+      },
+    })
+  })
+
+  test("full mode treats an empty workspace pull response as handled", async () => {
+    const handle = spawnFakeServer() as any
+    await using tmp = await tmpdir()
+    const file = path.join(tmp.path, "client.cs")
+    await Bun.write(file, "class C {}\n")
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const client = await LSPClient.create({
+          serverID: "fake",
+          server: handle as unknown as LSPServer.Handle,
+          root: tmp.path,
+          directory: tmp.path,
+        })
+
+        await client.connection.sendRequest("test/configure-pull-diagnostics", {
+          registerOn: "didOpen",
+          registrations: [{ identifier: "WorkspaceDocumentsAndProject", workspaceDiagnostics: true }],
+          workspaceDiagnosticsByIdentifier: {
+            WorkspaceDocumentsAndProject: [],
+          },
+        })
+
+        const version = await client.notify.open({ path: file })
+        const started = Date.now()
+        await client.waitForDiagnostics({ path: file, version, mode: "full" })
+
+        expect(Date.now() - started).toBeLessThan(1_000)
+
+        await client.shutdown()
+      },
+    })
+  })
+})

qimingcode/packages/opencode/test/lsp/index.test.ts

@@ -0,0 +1,109 @@
+import { describe, expect, spyOn } from "bun:test"
+import path from "path"
+import { Effect, Layer } from "effect"
+import { LSP } from "../../src/lsp"
+import { LSPServer } from "../../src/lsp"
+import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
+import { provideTmpdirInstance } from "../fixture/fixture"
+import { testEffect } from "../lib/effect"
+
+const it = testEffect(Layer.mergeAll(LSP.defaultLayer, CrossSpawnSpawner.defaultLayer))
+
+describe("lsp.spawn", () => {
+  it.live("does not spawn builtin LSP for files outside instance", () =>
+    provideTmpdirInstance(
+      (dir) =>
+        LSP.Service.use((lsp) =>
+          Effect.gen(function* () {
+            const spy = spyOn(LSPServer.Typescript, "spawn").mockResolvedValue(undefined)
+
+            try {
+              yield* lsp.touchFile(path.join(dir, "..", "outside.ts"))
+              yield* lsp.hover({
+                file: path.join(dir, "..", "hover.ts"),
+                line: 0,
+                character: 0,
+              })
+              expect(spy).toHaveBeenCalledTimes(0)
+            } finally {
+              spy.mockRestore()
+            }
+          }),
+        ),
+      { config: { lsp: true } },
+    ),
+  )
+
+  it.live("does not spawn builtin LSP for files inside instance when LSP is unset", () =>
+    provideTmpdirInstance((dir) =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const spy = spyOn(LSPServer.Typescript, "spawn").mockResolvedValue(undefined)
+
+          try {
+            yield* lsp.hover({
+              file: path.join(dir, "src", "inside.ts"),
+              line: 0,
+              character: 0,
+            })
+            expect(spy).toHaveBeenCalledTimes(0)
+          } finally {
+            spy.mockRestore()
+          }
+        }),
+      ),
+    ),
+  )
+
+  it.live("would spawn builtin LSP for files inside instance when lsp is true", () =>
+    provideTmpdirInstance(
+      (dir) =>
+        LSP.Service.use((lsp) =>
+          Effect.gen(function* () {
+            const spy = spyOn(LSPServer.Typescript, "spawn").mockResolvedValue(undefined)
+
+            try {
+              yield* lsp.hover({
+                file: path.join(dir, "src", "inside.ts"),
+                line: 0,
+                character: 0,
+              })
+              expect(spy).toHaveBeenCalledTimes(1)
+            } finally {
+              spy.mockRestore()
+            }
+          }),
+        ),
+      { config: { lsp: true } },
+    ),
+  )
+
+  it.live("would spawn builtin LSP for files inside instance when config object is provided", () =>
+    provideTmpdirInstance(
+      (dir) =>
+        LSP.Service.use((lsp) =>
+          Effect.gen(function* () {
+            const spy = spyOn(LSPServer.Typescript, "spawn").mockResolvedValue(undefined)
+
+            try {
+              yield* lsp.hover({
+                file: path.join(dir, "src", "inside.ts"),
+                line: 0,
+                character: 0,
+              })
+              expect(spy).toHaveBeenCalledTimes(1)
+            } finally {
+              spy.mockRestore()
+            }
+          }),
+        ),
+      {
+        config: {
+          lsp: {
+            eslint: { disabled: true },
+          },
+        },
+      },
+    ),
+  )
+})

qimingcode/packages/opencode/test/lsp/launch.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, test } from "bun:test"
+import fs from "fs/promises"
+import path from "path"
+import { spawn } from "../../src/lsp/launch"
+import { tmpdir } from "../fixture/fixture"
+
+describe("lsp.launch", () => {
+  test("spawns cmd scripts with spaces on Windows", async () => {
+    if (process.platform !== "win32") return
+
+    await using tmp = await tmpdir()
+    const dir = path.join(tmp.path, "with space")
+    const file = path.join(dir, "echo cmd.cmd")
+
+    await fs.mkdir(dir, { recursive: true })
+    await Bun.write(file, "@echo off\r\nif %~1==--stdio exit /b 0\r\nexit /b 7\r\n")
+
+    const proc = spawn(file, ["--stdio"])
+
+    expect(await proc.exited).toBe(0)
+  })
+})

qimingcode/packages/opencode/test/lsp/lifecycle.test.ts

@@ -0,0 +1,184 @@
+import { afterEach, beforeEach, describe, expect, spyOn, test } from "bun:test"
+import path from "path"
+import { Effect, Layer } from "effect"
+import { LSP } from "../../src/lsp"
+import { LSPServer } from "../../src/lsp"
+import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
+import { provideTmpdirInstance } from "../fixture/fixture"
+import { testEffect } from "../lib/effect"
+
+const it = testEffect(Layer.mergeAll(LSP.defaultLayer, CrossSpawnSpawner.defaultLayer))
+
+describe("LSP service lifecycle", () => {
+  let spawnSpy: ReturnType<typeof spyOn>
+
+  beforeEach(() => {
+    spawnSpy = spyOn(LSPServer.Typescript, "spawn").mockResolvedValue(undefined)
+  })
+
+  afterEach(() => {
+    spawnSpy.mockRestore()
+  })
+
+  it.live("init() completes without error", () => provideTmpdirInstance(() => LSP.Service.use((lsp) => lsp.init())))
+
+  it.live("status() returns empty array initially", () =>
+    provideTmpdirInstance(() =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.status()
+          expect(Array.isArray(result)).toBe(true)
+          expect(result.length).toBe(0)
+        }),
+      ),
+    ),
+  )
+
+  it.live("diagnostics() returns empty object initially", () =>
+    provideTmpdirInstance(() =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.diagnostics()
+          expect(typeof result).toBe("object")
+          expect(Object.keys(result).length).toBe(0)
+        }),
+      ),
+    ),
+  )
+
+  it.live("hasClients() returns false for .ts files in instance when LSP is unset", () =>
+    provideTmpdirInstance((dir) =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.hasClients(path.join(dir, "test.ts"))
+          expect(result).toBe(false)
+        }),
+      ),
+    ),
+  )
+
+  it.live("hasClients() returns true for .ts files in instance when lsp is true", () =>
+    provideTmpdirInstance(
+      (dir) =>
+        LSP.Service.use((lsp) =>
+          Effect.gen(function* () {
+            const result = yield* lsp.hasClients(path.join(dir, "test.ts"))
+            expect(result).toBe(true)
+          }),
+        ),
+      { config: { lsp: true } },
+    ),
+  )
+
+  it.live("hasClients() keeps built-in LSPs when config object is provided", () =>
+    provideTmpdirInstance(
+      (dir) =>
+        LSP.Service.use((lsp) =>
+          Effect.gen(function* () {
+            const result = yield* lsp.hasClients(path.join(dir, "test.ts"))
+            expect(result).toBe(true)
+          }),
+        ),
+      {
+        config: {
+          lsp: {
+            eslint: { disabled: true },
+          },
+        },
+      },
+    ),
+  )
+
+  it.live("hasClients() returns false for files outside instance", () =>
+    provideTmpdirInstance((dir) =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.hasClients(path.join(dir, "..", "outside.ts"))
+          expect(typeof result).toBe("boolean")
+        }),
+      ),
+    ),
+  )
+
+  it.live("workspaceSymbol() returns empty array with no clients", () =>
+    provideTmpdirInstance(() =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.workspaceSymbol("test")
+          expect(Array.isArray(result)).toBe(true)
+          expect(result.length).toBe(0)
+        }),
+      ),
+    ),
+  )
+
+  it.live("definition() returns empty array for unknown file", () =>
+    provideTmpdirInstance((dir) =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.definition({
+            file: path.join(dir, "nonexistent.ts"),
+            line: 0,
+            character: 0,
+          })
+          expect(Array.isArray(result)).toBe(true)
+        }),
+      ),
+    ),
+  )
+
+  it.live("references() returns empty array for unknown file", () =>
+    provideTmpdirInstance((dir) =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          const result = yield* lsp.references({
+            file: path.join(dir, "nonexistent.ts"),
+            line: 0,
+            character: 0,
+          })
+          expect(Array.isArray(result)).toBe(true)
+        }),
+      ),
+    ),
+  )
+
+  it.live("multiple init() calls are idempotent", () =>
+    provideTmpdirInstance(() =>
+      LSP.Service.use((lsp) =>
+        Effect.gen(function* () {
+          yield* lsp.init()
+          yield* lsp.init()
+          yield* lsp.init()
+        }),
+      ),
+    ),
+  )
+})
+
+describe("LSP.Diagnostic", () => {
+  test("pretty() formats error diagnostic", () => {
+    const result = LSP.Diagnostic.pretty({
+      range: { start: { line: 9, character: 4 }, end: { line: 9, character: 10 } },
+      message: "Type 'string' is not assignable to type 'number'",
+      severity: 1,
+    } as any)
+    expect(result).toBe("ERROR [10:5] Type 'string' is not assignable to type 'number'")
+  })
+
+  test("pretty() formats warning diagnostic", () => {
+    const result = LSP.Diagnostic.pretty({
+      range: { start: { line: 0, character: 0 }, end: { line: 0, character: 5 } },
+      message: "Unused variable",
+      severity: 2,
+    } as any)
+    expect(result).toBe("WARN [1:1] Unused variable")
+  })
+
+  test("pretty() defaults to ERROR when no severity", () => {
+    const result = LSP.Diagnostic.pretty({
+      range: { start: { line: 0, character: 0 }, end: { line: 0, character: 1 } },
+      message: "Something wrong",
+    } as any)
+    expect(result).toBe("ERROR [1:1] Something wrong")
+  })
+})